Hoisting mechanism



H. C. BECKWITH.

HOISTING MECHANISM.

APPLICATION FILED Aue.22. 1919.

1,481,090 Pat ented Oct. 3, 1922.

3 SHEETSSHEET I.

I l I I l l 1 H. C. BECKWITH.

HOISTING MECHANISM.

APPLICATION FILED AUG,22, 1919. 1,4L3LQ90, Patented 0011.3,1922.

3 SHEETS-SHEET 2- H. C. BECKWITH.

HOISTING MECHANISM.

v APPLICATION FILED AUG.22, 1919. 1 43 1 99 Patented Oct. 3, 1922.

3 SHEETS-SHEET 3.

Patented et. 3, 1922.

STATES PATENT-OFFICE.

HENRY C. BIICKWITH, OF RAVENNA. @HIO, ASSIGNOR TO THE JOHN 1E. BYERSMACHINE COMPANY, 015 RAVEN'N'A, OHIO, A CORPORATION OF OHIO.

HOISTING MECHANISM.

Application filed August 22, 1919. Serial No. 319,131.

To all whom it may concern: I

Be it known that I, HENRY C. BECKWITH, a citizen of the United States,and a resident of Ravenna, county of Portage, and State of Ohio,haveinvented a new and useful Improvement in Hoisting Mechanism, ofwhich the following is a specification, the principle of the inventionbeing hereinexplained and thebest mode in which I have contemplatedapplying thatprinciple, so as In said annexed drawings 2-"- V Fig. 1 isa plan view of mymacliine; Fig. 2 is a side elevation of the same; Fig.3 is a side elevation showing the boom. bucket, and controlling meanstherefor; Fig. I is a section on the line 4-4, Fig. 1; and Fig. 5 is asection on the line 5-5,

In Figs. 1 and 2 the generalconstruction of the machine may be seen,consisting of a rectangular framework 1 supported upon wheels 2 and 3,of which the wheels 2 are-gpropelling wheels and the wheels 3 thesteering wheels. The steering wheels"3.".

which are at the rear, may be controlled by means of a steering column4, worm 5 and gear 6, and a transversely extending'shaft 7, over whichis wound a chain 8 attached to either end of an axle 9 mounted in thetwo opposite wheels 3.

On the floor or horizontal framework '1 of the machine is mounted an Aframe, consisting of members 10, braced by means of a diagonal support11 andforming an upper support for a vertical rotatable mast 12,

which is suitably mounted at its lower end in the floor of the frame.Supported upon suitable uprights, 13 and 14, attached to the frame andto' the diagonal brace 11 is a canopy 15. The machine as so fardescribed is not essentially difierent from previous machines of thissame general type.

Mounted on the fioorof the machine at the rear is a suitable powermeans, such as a gas engine 16, with a cooling"system 17 therefor,drivin two power shafts '18 and 19, which are disposed in parallelismand transversely of the machine frame. The

drive to' these power shafts is through gears 20 and 21, and 24, 25 and26, and the engine16, with the power shafts l8 and 19 and winding drums22 and 23 thereon, constitutes a two-drum hoisting engine which i is incommon use on amachine of this character. The drums 22 and 23 are looseon the shafts 18 and 19 and may be thrown 'into engagement therewith bymeans of clutches 27 and 28, respectively, and the operating levers 29and 30. The shafts 18 and 19 differ from the shafts of the ordinarytwo-drum hoists only in being extended transversely across the frame,and .there carrying friction heads 31 and 32, which are respectivelykeyed to the two shafts. C0- operating with-these friction heads orclutch members are loose members 33 and 34, which are adapted to bemoved outward and away from the members 31 and 32. and into and out ofengagement therewith. The memhere 33 and 34 carry sprockets 35 and 36integral therewith.

a In Fig. 4 the construction of the means for engaging and disengagingthe sprockets 35 and 36 is shown. Similar 'means are used 'oneachsprocket. The member 33, which is rotatably and-slidably mounted on theshaft 1 18 and carries the sprocket 35 is adapted to be moved intooperative engagement with the friction head 31 by means of a collar 3?-and slidable key 38. The'key 38 is slidable lengthwise on the shaft 18in a slot which is aga-iI-istthe collar 37 by means of, a pin 39rotatably mounted in a longitudinal opening in the end-of the shaft andoperated by means of a screw 40 formed on its outer end and formedtherein. and may be moved inward working in a threaded collar 41attached to the frame. Attached to the outer end of the threadedmember-40 is a lever 42, adapted,

upon being swung in one direction, to work the'pin 39 inward to pressthe friction head 33 against the head 31, thus engaging-the sprocket 35on thelshaft 18. Areversemo'vement oftli lever42wil l permit thedisengagement of the two frictional members which,.constitute theclutch, and a similar construction is provided for engaging the clutchmembers 34 and 32 to fasten the sprocket 36 to the shaft 19. Thissimilar means also employs a lever 43 connected'by means of a rod 44- tothe lever 42, while a similar pin 45 is provided, but having anoppositely threadedportion for engaging the clutch 34 upon thedisengagement of the clutch 33..

The connection between the two levers 41 and 43 cause simultaneousoperation of the two clutches, but in reverse directions so that one isdisengaged when the other is engaged. The rod 44, for operating thelevers, is extended and connected to the shaft 46, oper- 'ated by meansof a hand lever 47, and movementof this hand lever in its two directionscauses the above described operation of the sprocket-engaging clutches.

Mounted beneath the frameof the machine is a propulsion shaft 60, (seeFig. 5), which is, in reality, two shafts driven by differentialmechanism contained in a differential case 61 and operated by a singledifferential gear or. sprocket 62 in the usual manner. On this shaft 60are carried two sprockets 63, over which are mounted chains 64 fordriving sprockets 65 carried on the driving wheels 2, both drivingwheels being driven through the differential means and chains in theusual manner.

sion 73 of this shaft 66, and may be thrown into engagementby means of aclutch 74.

There is a chain 80 passing over the sprockets 35 and 36 on the shafts18 and l9,

--then down and around the lower side of the sprocket 62 driving thedifierential mechanism, and then up and around the sprocket 67 drivingthe thirdfshaft 66. This chain then passes over two idle sprockets 81and 82, of which .thesprocket81 is adjustably carried on ashort link 83,the adjustment being secured by means of a turnbuckle 84, which may betightened to draw this sprocket away from the others and tighten thetensionon the chain. In this way a drive is secured for all of theshafts and drums of the machine from a single chain and from a singledriving shaft, which is the shaft of the engine, without the use of anyreverse gearing or of any transmission mechanism, such asyis commonlyused in these machines, and is to be avoided if possiblebecause of itsextreme weight andcomplication. By

the operation of the lever either the sprocket 35 or 36 may be engagedfor driving by the shafts 18 and 19, respectively, in this way securingeither a forward or reverse drive of the chain 80. Thus, the machine maybe propelled in either direction by the operation of this chain, or theshaft 66 may be turned in either direction, thus operating the drums 68,71 and 7 2 when properly engaged by their respective clutches. \Vhen themachine is to be spotted and the boom is to be operated a clutch 85,which enages one of the driving sprockets 63 which drives one of thechains 64 extending to the driving wheels of the machine, is thrown outof engagement by means of a lever 86, and in this way one of the wheelsof the machine is disconnected.

.When so disconnected the differential mechanism is free to turn oneportion of the shaft 60 as the other or connected sprocket 63 is heldagainst movement by the welght of the machine resting upon the wheelconnected thereto.

The operation of the various drums ano hauling lines in connection withthe manipulation of the boom and hoisting mechanism is substantially thesame as on other machines of this general type, and need not bedescribed in detail. The present invention relates to the means foroperating the drums and propelling mechanism from a single engine andthrough" the combined mechanism already described.

v Other modes of applying the principle of my invention may be employedinstead of the one explained,change being made as regards the mechanismherein disclosed, provided the means stated by any of the followingclaims or the equivalent of such stated means be employed. 7 Y

I therefore particularly point out and distinctly claim as myinvention 1. In a machine of the character described, the combination ofa frame, traction Wheels therefor, an engine, two driving elementsoperable thereby in opposite directions, a hoisting drum shaft, adifferential shaft operative y connected to said traction wheels,

and means operable in either direction, by

said engine through said two driving elements, said means beingconnected to operate said hoisting drum shaft and said differentialshaft.

2. In a machine of the character described, the combination of a frame,traction wheels therefor, an engine, two driving elements operablethereby in opposite directions, a hoisting drum shaft, a differentialshaft operatively connected to said traction wheels, and means operablein either direction by said engine through said two driving elements,said means being connected to operate said hoisting drum shaft and saiddifferential shaft, and means adapted to operatively disconnect saiddifferential shaft from one of said Wheels while permitting continuousoperation of said shaft.

3. In a machine of the character described, the combination of a frame,traction wheels therefor, an engine, two driving elements operablethereby in opposite directions, a

hoisting drum shaft, a differential shaft operatively connected to saidtraction wheels, and means operable in either direction by said enginethrough said two driving elements, said means being connected to operatesaid hoisting drum shaft and said differential shaft, and means adaptedto simultaneously connect one of said two driving elements from saidengine and to disconnect the other thereof.

4. In a machine of the character described, the combination of a frame,traction wheels therefor, an engine, two power shafts operable by saidengine in opposite directions, drivin elements loose on said shafts butmovab e into engagement therewith, a hoisting drum shaft, a differentialshaft operatively connected to said traction wheels, :1 continuousdriving belt operatively connect- ,ing said driving elements on saidpower shafts with said hoisting drum shaft and said differential shaft,and a single means adapted to move either of said driving elements onsaid power shafts into engagement with its respective shafts.

5. In a machine of the character described, the combination of a frame.traction wheels therefor, an engine, two power shafts operable by saidengine in opposite direction, driving elements loose on said shafts butmovable into engagement therewith, a hoisting drum shaft, a differentialshaft operatively connected to said traction wheels, a contlnuousdriving belt operatively connecting said driving elements on said powershafts with said hoisting drum shaft and said differential shaft. asingle operating lever having connection with said two driving elements,said lever being adapted to move either of said driving elements intoengagement with its respective shaft, and means adapted to disconnectone of said traction wheels from said differential shaft.

6. 111a machine of the character described, the combination of a frame,traction wheels therefor, an engine, a propelling shaft operativelyconnected with said wheels, a hoisting shaft, and two oppositelyrotating power shafts. driving and driven elements on said shafts, abelt operatively connecting all of said elements, and means adapted tooperativelv connect either one of the driving elements on said powershafts with its respective shaft.

Signed by me, this 9 day of Aug, 1919.

HENRY C. BECIUYITH.

